91146905 has 4 divisors (see below), whose sum is σ = 109376292. Its totient is φ = 72917520.

The previous prime is 91146883. The next prime is 91146931. The reversal of 91146905 is 50964119.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50964119 = 3041 ⋅16759.

It can be written as a sum of positive squares in 2 ways, for example, as 69839449 + 21307456 = 8357^2 + 4616^2 .

It is not a de Polignac number, because 91146905 - 2¹² = 91142809 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9114686 + ... + 9114695.

It is an arithmetic number, because the mean of its divisors is an integer number (27344073).

Almost surely, 2^91146905 is an apocalyptic number.

It is an amenable number.

91146905 is a deficient number, since it is larger than the sum of its proper divisors (18229387).

91146905 is a wasteful number, since it uses less digits than its factorization.

91146905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18229386.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 91146905 is about 9547.0888233011. The cubic root of 91146905 is about 450.0360547243.

The spelling of 91146905 in words is "ninety-one million, one hundred forty-six thousand, nine hundred five".